all: use %w instead of %v to wrap errors (#1275)

* all: use %w instead of %v for nested errors with fmt.Errorf

* all: update generated code to use %w instead of %v for error wrapping

examples/privacyadmin/ent/client.go

@@ -66,7 +66,7 @@ func (c *Client) Tx(ctx context.Context) (*Tx, error) {
 	}
 	tx, err := newTx(ctx, c.driver)
 	if err != nil {
-		return nil, fmt.Errorf("ent: starting a transaction: %v", err)
+		return nil, fmt.Errorf("ent: starting a transaction: %w", err)
 	}
 	cfg := c.config
 	cfg.driver = tx
@@ -86,7 +86,7 @@ func (c *Client) BeginTx(ctx context.Context, opts *sql.TxOptions) (*Tx, error)
 		BeginTx(context.Context, *sql.TxOptions) (dialect.Tx, error)
 	}).BeginTx(ctx, opts)
 	if err != nil {
-		return nil, fmt.Errorf("ent: starting a transaction: %v", err)
+		return nil, fmt.Errorf("ent: starting a transaction: %w", err)
 	}
 	cfg := c.config
 	cfg.driver = &txDriver{tx: tx, drv: c.driver}

examples/privacyadmin/ent/ent.go

@@ -265,7 +265,7 @@ func isSQLConstraintError(err error) (*ConstraintError, bool) {
 // rollback calls tx.Rollback and wraps the given error with the rollback error if present.
 func rollback(tx dialect.Tx, err error) error {
 	if rerr := tx.Rollback(); rerr != nil {
-		err = fmt.Errorf("%s: %v", err.Error(), rerr)
+		err = fmt.Errorf("%w: %v", err, rerr)
 	}
 	if err, ok := isSQLConstraintError(err); ok {
 		return err

examples/privacyadmin/ent/migrate/migrate.go

@@ -52,7 +52,7 @@ func NewSchema(drv dialect.Driver) *Schema { return &Schema{drv: drv} }
 func (s *Schema) Create(ctx context.Context, opts ...schema.MigrateOption) error {
 	migrate, err := schema.NewMigrate(s.drv, opts...)
 	if err != nil {
-		return fmt.Errorf("ent/migrate: %v", err)
+		return fmt.Errorf("ent/migrate: %w", err)
 	}
 	return migrate.Create(ctx, Tables...)
 }
@@ -70,7 +70,7 @@ func (s *Schema) WriteTo(ctx context.Context, w io.Writer, opts ...schema.Migrat
 	}
 	migrate, err := schema.NewMigrate(drv, opts...)
 	if err != nil {
-		return fmt.Errorf("ent/migrate: %v", err)
+		return fmt.Errorf("ent/migrate: %w", err)
 	}
 	return migrate.Create(ctx, Tables...)
 }

examples/privacyadmin/ent/user_query.go

@@ -344,7 +344,7 @@ func (uq *UserQuery) sqlCount(ctx context.Context) (int, error) {
 func (uq *UserQuery) sqlExist(ctx context.Context) (bool, error) {
 	n, err := uq.sqlCount(ctx)
 	if err != nil {
-		return false, fmt.Errorf("ent: check existence: %v", err)
+		return false, fmt.Errorf("ent: check existence: %w", err)
 	}
 	return n > 0, nil
 }

examples/privacyadmin/example_test.go

@@ -43,17 +43,17 @@ func Do(ctx context.Context, client *ent.Client) error {
 	// Expect operation to fail, because viewer-context
 	// is missing (first mutation rule check).
 	if _, err := client.User.Create().Save(ctx); !errors.Is(err, privacy.Deny) {
-		return fmt.Errorf("expect operation to fail, but got %v", err)
+		return fmt.Errorf("expect operation to fail, but got %w", err)
 	}
 	// Apply the same operation with "Admin" role.
 	admin := viewer.NewContext(ctx, viewer.UserViewer{Role: viewer.Admin})
 	if _, err := client.User.Create().Save(admin); err != nil {
-		return fmt.Errorf("expect operation to pass, but got %v", err)
+		return fmt.Errorf("expect operation to pass, but got %w", err)
 	}
 	// Apply the same operation with "ViewOnly" role.
 	viewOnly := viewer.NewContext(ctx, viewer.UserViewer{Role: viewer.View})
 	if _, err := client.User.Create().Save(viewOnly); !errors.Is(err, privacy.Deny) {
-		return fmt.Errorf("expect operation to fail, but got %v", err)
+		return fmt.Errorf("expect operation to fail, but got %w", err)
 	}
 	// Allow all viewers to query users.
 	for _, ctx := range []context.Context{ctx, viewOnly, admin} {
@@ -64,7 +64,7 @@ func Do(ctx context.Context, client *ent.Client) error {
 	// Bind a privacy decision to the context (bypass all other rules).
 	allow := privacy.DecisionContext(ctx, privacy.Allow)
 	if _, err := client.User.Create().Save(allow); err != nil {
-		return fmt.Errorf("expect operation to pass, but got %v", err)
+		return fmt.Errorf("expect operation to pass, but got %w", err)
 	}
 	return nil
 }